#coding=utf-8
'''
Created on 2009-5-5

@author: Administrator
'''
import cgi 
from google.appengine.api import users 
from google.appengine.ext import webapp 
from google.appengine.ext.webapp.util import run_wsgi_app 
from google.appengine.ext import db
class Greeting(db.Model):  
    author = db.UserProperty()  
    content = db.StringProperty(multiline=True)  
    date = db.DateTimeProperty(auto_now_add=True)
class MainPage(webapp.RequestHandler):  
    def get(self):    
        self.response.out.write('<html><body>')    
        greetings = db.GqlQuery("SELECT * FROM Greeting ORDER BY date DESC LIMIT 10")    
        for greeting in greetings:      
            if greeting.author:        
                self.response.out.write('<b>%s</b> wrote:' % greeting.author.nickname())      
            else:        
                self.response.out.write('An anonymous person wrote:')      
                self.response.out.write('<blockquote>%s</blockquote>' %                              
                                        cgi.escape(greeting.content))    
                # Write the submission form and the footer of the page    
        self.response.out.write("""          
                <form action="/sign" method="post">            
                <div><textarea name="content" rows="3" cols="60"></textarea></div>            
                <div><input type="submit" value="Sign Guestbook"></div>          
                </form>        
                </body>      
                </html>""")
class Guestbook(webapp.RequestHandler):  
    def post(self):    
        greeting = Greeting()    
        if users.get_current_user():      
            greeting.author = users.get_current_user()    
        greeting.content = self.request.get('content')    
        greeting.put()    
        self.redirect('/')
application = webapp.WSGIApplication(                                     
                                     [('/', MainPage),                                      
                                      ('/sign', Guestbook)],                                     
                                      debug=True)
def main():  
    run_wsgi_app(application)
if __name__ == "__main__":  main()